system_call.s

linux0.11 version(301k)

<a name=L134 href="source/kernel/system_call.s#L134">134</a>         push %fs
<a name=L135 href="source/kernel/system_call.s#L135">135</a>         pushl %edx
<a name=L136 href="source/kernel/system_call.s#L136">136</a>         pushl %ecx
<a name=L137 href="source/kernel/system_call.s#L137">137</a>         pushl %ebx
<a name=L138 href="source/kernel/system_call.s#L138">138</a>         pushl %eax
<a name=L139 href="source/kernel/system_call.s#L139">139</a>         movl $0x10,%eax
<a name=L140 href="source/kernel/system_call.s#L140">140</a>         mov %ax,%ds
<a name=L141 href="source/kernel/system_call.s#L141">141</a>         mov %ax,%es
<a name=L142 href="source/kernel/system_call.s#L142">142</a>         movl $0x17,%eax
<a name=L143 href="source/kernel/system_call.s#L143">143</a>         mov %ax,%fs
<a name=L144 href="source/kernel/system_call.s#L144">144</a>         pushl $ret_from_sys_call
<a name=L145 href="source/kernel/system_call.s#L145">145</a>         jmp _math_error
<a name=L146 href="source/kernel/system_call.s#L146">146</a> 
<a name=L147 href="source/kernel/system_call.s#L147">147</a> .align 2
<a name=L148 href="source/kernel/system_call.s#L148">148</a> _device_not_available:
<a name=L149 href="source/kernel/system_call.s#L149">149</a>         push %ds
<a name=L150 href="source/kernel/system_call.s#L150">150</a>         push %es
<a name=L151 href="source/kernel/system_call.s#L151">151</a>         push %fs
<a name=L152 href="source/kernel/system_call.s#L152">152</a>         pushl %edx
<a name=L153 href="source/kernel/system_call.s#L153">153</a>         pushl %ecx
<a name=L154 href="source/kernel/system_call.s#L154">154</a>         pushl %ebx
<a name=L155 href="source/kernel/system_call.s#L155">155</a>         pushl %eax
<a name=L156 href="source/kernel/system_call.s#L156">156</a>         movl $0x10,%eax
<a name=L157 href="source/kernel/system_call.s#L157">157</a>         mov %ax,%ds
<a name=L158 href="source/kernel/system_call.s#L158">158</a>         mov %ax,%es
<a name=L159 href="source/kernel/system_call.s#L159">159</a>         movl $0x17,%eax
<a name=L160 href="source/kernel/system_call.s#L160">160</a>         mov %ax,%fs
<a name=L161 href="source/kernel/system_call.s#L161">161</a>         pushl $ret_from_sys_call
<a name=L162 href="source/kernel/system_call.s#L162">162</a>         clts                            # clear TS so that we can use math
<a name=L163 href="source/kernel/system_call.s#L163">163</a>         movl %cr0,%eax
<a name=L164 href="source/kernel/system_call.s#L164">164</a>         testl $0x4,%eax                 # EM (math emulation bit)
<a name=L165 href="source/kernel/system_call.s#L165">165</a>         je _math_state_restore
<a name=L166 href="source/kernel/system_call.s#L166">166</a>         pushl %ebp
<a name=L167 href="source/kernel/system_call.s#L167">167</a>         pushl %esi
<a name=L168 href="source/kernel/system_call.s#L168">168</a>         pushl %edi
<a name=L169 href="source/kernel/system_call.s#L169">169</a>         call _math_emulate
<a name=L170 href="source/kernel/system_call.s#L170">170</a>         popl %edi
<a name=L171 href="source/kernel/system_call.s#L171">171</a>         popl %esi
<a name=L172 href="source/kernel/system_call.s#L172">172</a>         popl %ebp
<a name=L173 href="source/kernel/system_call.s#L173">173</a>         ret
<a name=L174 href="source/kernel/system_call.s#L174">174</a> 
<a name=L175 href="source/kernel/system_call.s#L175">175</a> .align 2
<a name=L176 href="source/kernel/system_call.s#L176">176</a> _timer_interrupt:
<a name=L177 href="source/kernel/system_call.s#L177">177</a>         push %ds                # save ds,es and put kernel data space
<a name=L178 href="source/kernel/system_call.s#L178">178</a>         push %es                # into them. %fs is used by _system_call
<a name=L179 href="source/kernel/system_call.s#L179">179</a>         push %fs
<a name=L180 href="source/kernel/system_call.s#L180">180</a>         pushl %edx              # we save %eax,%ecx,%edx as gcc doesn't
<a name=L181 href="source/kernel/system_call.s#L181">181</a>         pushl %ecx              # save those across function calls. %ebx
<a name=L182 href="source/kernel/system_call.s#L182">182</a>         pushl %ebx              # is saved as we use that in ret_sys_call
<a name=L183 href="source/kernel/system_call.s#L183">183</a>         pushl %eax
<a name=L184 href="source/kernel/system_call.s#L184">184</a>         movl $0x10,%eax
<a name=L185 href="source/kernel/system_call.s#L185">185</a>         mov %ax,%ds
<a name=L186 href="source/kernel/system_call.s#L186">186</a>         mov %ax,%es
<a name=L187 href="source/kernel/system_call.s#L187">187</a>         movl $0x17,%eax
<a name=L188 href="source/kernel/system_call.s#L188">188</a>         mov %ax,%fs
<a name=L189 href="source/kernel/system_call.s#L189">189</a>         incl _jiffies
<a name=L190 href="source/kernel/system_call.s#L190">190</a>         movb $0x20,%al          # EOI to interrupt controller #1
<a name=L191 href="source/kernel/system_call.s#L191">191</a>         outb %al,$0x20
<a name=L192 href="source/kernel/system_call.s#L192">192</a>         movl CS(%esp),%eax
<a name=L193 href="source/kernel/system_call.s#L193">193</a>         andl $3,%eax            # %eax is CPL (0 or 3, 0=supervisor)
<a name=L194 href="source/kernel/system_call.s#L194">194</a>         pushl %eax
<a name=L195 href="source/kernel/system_call.s#L195">195</a>         call _do_timer          # 'do_timer(long CPL)' does everything from
<a name=L196 href="source/kernel/system_call.s#L196">196</a>         addl $4,%esp            # task switching to accounting ...
<a name=L197 href="source/kernel/system_call.s#L197">197</a>         jmp ret_from_sys_call
<a name=L198 href="source/kernel/system_call.s#L198">198</a> 
<a name=L199 href="source/kernel/system_call.s#L199">199</a> .align 2
<a name=L200 href="source/kernel/system_call.s#L200">200</a> _sys_execve:
<a name=L201 href="source/kernel/system_call.s#L201">201</a>         lea EIP(%esp),%eax
<a name=L202 href="source/kernel/system_call.s#L202">202</a>         pushl %eax
<a name=L203 href="source/kernel/system_call.s#L203">203</a>         call _do_execve
<a name=L204 href="source/kernel/system_call.s#L204">204</a>         addl $4,%esp
<a name=L205 href="source/kernel/system_call.s#L205">205</a>         ret
<a name=L206 href="source/kernel/system_call.s#L206">206</a> 
<a name=L207 href="source/kernel/system_call.s#L207">207</a> .align 2
<a name=L208 href="source/kernel/system_call.s#L208">208</a> _sys_fork:
<a name=L209 href="source/kernel/system_call.s#L209">209</a>         call _find_empty_process
<a name=L210 href="source/kernel/system_call.s#L210">210</a>         testl %eax,%eax
<a name=L211 href="source/kernel/system_call.s#L211">211</a>         js 1f
<a name=L212 href="source/kernel/system_call.s#L212">212</a>         push %gs
<a name=L213 href="source/kernel/system_call.s#L213">213</a>         pushl %esi
<a name=L214 href="source/kernel/system_call.s#L214">214</a>         pushl %edi
<a name=L215 href="source/kernel/system_call.s#L215">215</a>         pushl %ebp
<a name=L216 href="source/kernel/system_call.s#L216">216</a>         pushl %eax
<a name=L217 href="source/kernel/system_call.s#L217">217</a>         call _copy_process
<a name=L218 href="source/kernel/system_call.s#L218">218</a>         addl $20,%esp
<a name=L219 href="source/kernel/system_call.s#L219">219</a> 1:      ret
<a name=L220 href="source/kernel/system_call.s#L220">220</a> 
<a name=L221 href="source/kernel/system_call.s#L221">221</a> _hd_interrupt:
<a name=L222 href="source/kernel/system_call.s#L222">222</a>         pushl %eax
<a name=L223 href="source/kernel/system_call.s#L223">223</a>         pushl %ecx
<a name=L224 href="source/kernel/system_call.s#L224">224</a>         pushl %edx
<a name=L225 href="source/kernel/system_call.s#L225">225</a>         push %ds
<a name=L226 href="source/kernel/system_call.s#L226">226</a>         push %es
<a name=L227 href="source/kernel/system_call.s#L227">227</a>         push %fs
<a name=L228 href="source/kernel/system_call.s#L228">228</a>         movl $0x10,%eax
<a name=L229 href="source/kernel/system_call.s#L229">229</a>         mov %ax,%ds
<a name=L230 href="source/kernel/system_call.s#L230">230</a>         mov %ax,%es
<a name=L231 href="source/kernel/system_call.s#L231">231</a>         movl $0x17,%eax
<a name=L232 href="source/kernel/system_call.s#L232">232</a>         mov %ax,%fs
<a name=L233 href="source/kernel/system_call.s#L233">233</a>         movb $0x20,%al
<a name=L234 href="source/kernel/system_call.s#L234">234</a>         outb %al,$0xA0          # EOI to interrupt controller #1
<a name=L235 href="source/kernel/system_call.s#L235">235</a>         jmp 1f                  # give port chance to breathe
<a name=L236 href="source/kernel/system_call.s#L236">236</a> 1:      jmp 1f
<a name=L237 href="source/kernel/system_call.s#L237">237</a> 1:      xorl %edx,%edx
<a name=L238 href="source/kernel/system_call.s#L238">238</a>         xchgl _do_hd,%edx
<a name=L239 href="source/kernel/system_call.s#L239">239</a>         testl %edx,%edx
<a name=L240 href="source/kernel/system_call.s#L240">240</a>         jne 1f
<a name=L241 href="source/kernel/system_call.s#L241">241</a>         movl $_unexpected_hd_interrupt,%edx
<a name=L242 href="source/kernel/system_call.s#L242">242</a> 1:      outb %al,$0x20
<a name=L243 href="source/kernel/system_call.s#L243">243</a>         call *%edx              # "interesting" way of handling intr.
<a name=L244 href="source/kernel/system_call.s#L244">244</a>         pop %fs
<a name=L245 href="source/kernel/system_call.s#L245">245</a>         pop %es
<a name=L246 href="source/kernel/system_call.s#L246">246</a>         pop %ds
<a name=L247 href="source/kernel/system_call.s#L247">247</a>         popl %edx
<a name=L248 href="source/kernel/system_call.s#L248">248</a>         popl %ecx
<a name=L249 href="source/kernel/system_call.s#L249">249</a>         popl %eax
<a name=L250 href="source/kernel/system_call.s#L250">250</a>         iret
<a name=L251 href="source/kernel/system_call.s#L251">251</a> 
<a name=L252 href="source/kernel/system_call.s#L252">252</a> _floppy_interrupt:
<a name=L253 href="source/kernel/system_call.s#L253">253</a>         pushl %eax
<a name=L254 href="source/kernel/system_call.s#L254">254</a>         pushl %ecx
<a name=L255 href="source/kernel/system_call.s#L255">255</a>         pushl %edx
<a name=L256 href="source/kernel/system_call.s#L256">256</a>         push %ds
<a name=L257 href="source/kernel/system_call.s#L257">257</a>         push %es
<a name=L258 href="source/kernel/system_call.s#L258">258</a>         push %fs
<a name=L259 href="source/kernel/system_call.s#L259">259</a>         movl $0x10,%eax
<a name=L260 href="source/kernel/system_call.s#L260">260</a>         mov %ax,%ds
<a name=L261 href="source/kernel/system_call.s#L261">261</a>         mov %ax,%es
<a name=L262 href="source/kernel/system_call.s#L262">262</a>         movl $0x17,%eax
<a name=L263 href="source/kernel/system_call.s#L263">263</a>         mov %ax,%fs
<a name=L264 href="source/kernel/system_call.s#L264">264</a>         movb $0x20,%al
<a name=L265 href="source/kernel/system_call.s#L265">265</a>         outb %al,$0x20          # EOI to interrupt controller #1
<a name=L266 href="source/kernel/system_call.s#L266">266</a>         xorl %eax,%eax
<a name=L267 href="source/kernel/system_call.s#L267">267</a>         xchgl _do_floppy,%eax
<a name=L268 href="source/kernel/system_call.s#L268">268</a>         testl %eax,%eax
<a name=L269 href="source/kernel/system_call.s#L269">269</a>         jne 1f
<a name=L270 href="source/kernel/system_call.s#L270">270</a>         movl $_unexpected_floppy_interrupt,%eax
<a name=L271 href="source/kernel/system_call.s#L271">271</a> 1:      call *%eax              # "interesting" way of handling intr.
<a name=L272 href="source/kernel/system_call.s#L272">272</a>         pop %fs
<a name=L273 href="source/kernel/system_call.s#L273">273</a>         pop %es
<a name=L274 href="source/kernel/system_call.s#L274">274</a>         pop %ds
<a name=L275 href="source/kernel/system_call.s#L275">275</a>         popl %edx
<a name=L276 href="source/kernel/system_call.s#L276">276</a>         popl %ecx
<a name=L277 href="source/kernel/system_call.s#L277">277</a>         popl %eax
<a name=L278 href="source/kernel/system_call.s#L278">278</a>         iret
<a name=L279 href="source/kernel/system_call.s#L279">279</a> 
<a name=L280 href="source/kernel/system_call.s#L280">280</a> _parallel_interrupt:
<a name=L281 href="source/kernel/system_call.s#L281">281</a>         pushl %eax
<a name=L282 href="source/kernel/system_call.s#L282">282</a>         movb $0x20,%al
<a name=L283 href="source/kernel/system_call.s#L283">283</a>         outb %al,$0x20
<a name=L284 href="source/kernel/system_call.s#L284">284</a>         popl %eax
<a name=L285 href="source/kernel/system_call.s#L285">285</a>         iret
</pre><hr>
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